Dell Inspiron 13 7390 2-in-1 screw size
M1.2 / M1.6 / M2 / M2.5 · 1.3 to 4 mm long
Dell Inspiron 13 7390 2-in-1 takes M1.2, M1.6, M2 and M2.5 metric screws in lengths from 1.3 to 4 mm.
There are 16 separate fitment records for it, including keyboard (qty 4) (M1.2), keyboard (qty 29) (M1.2) and touchpad (qty 3) (M1.6), plus 13 more in the table below.
16 of the 16 records are marked confirmed, drawn from 1 source (dl.dell.com).
M1.2 means a 1.2 mm nominal diameter with a 0.25 mm thread pitch. Imperial look-alike: #0-80 UNF (1.52 mm) is the closest imperial screw, but it is bigger — not a substitute.
Dell Inspiron 13 7390 2-in-1 screw specifications
One row per fitment record. Head, drive are shown only where the source states them; pitch is the ISO coarse pitch for the thread.
| Thread | Length | Pitch | Head | Drive | Where it goes | Status |
|---|---|---|---|---|---|---|
| M1.2 | 1.3 mm | 0.25 mm | not stated | not stated | Keyboard (qty 4) | Confirmed |
| M1.2 | 1.8 mm | 0.25 mm | not stated | not stated | Keyboard (qty 29) | Confirmed |
| M1.6 | 2 mm | 0.35 mm | not stated | not stated | Touchpad (qty 3) | Confirmed |
| M1.6 | 4 mm | 0.35 mm | not stated | not stated | Battery (qty 1) | Confirmed |
| M2 | 2 mm | 0.4 mm | not stated | not stated | Battery (qty 4, broadhead) | Confirmed |
| M2 | 2 mm | 0.4 mm | not stated | not stated | Fan (qty 2) | Confirmed |
| M2 | 2 mm | 0.4 mm | not stated | not stated | SSD (qty 1) | Confirmed |
| M2 | 2 mm | 0.4 mm | not stated | not stated | System board (qty 4, broadhead) | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | DC-in (qty 1) | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | Fan (qty 2) | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | SSD (qty 2) | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | Touchpad (qty 3) | Confirmed |
| M2 | 3 mm | 0.4 mm | not stated | not stated | Wireless card (qty 1) | Confirmed |
| M2 | 3.5 mm | 0.4 mm | not stated | not stated | Hinge (qty 5) | Confirmed |
| M2 | 4 mm | 0.4 mm | not stated | not stated | Base cover (qty 6) | Confirmed |
| M2.5 | 3.5 mm | 0.45 mm | not stated | not stated | Hinge (qty 5) | Confirmed |
Fitment records and sources
Keyboard (qty 4)
pitch 0.25 mm · tap 0.95 mm · clearance 1.4 mm · PH000 / JIS 00 / Torx T1–T2
Keyboard (qty 29)
pitch 0.25 mm · tap 0.95 mm · clearance 1.4 mm · PH000 / JIS 00 / Torx T1–T2
Touchpad (qty 3)
pitch 0.35 mm · tap 1.25 mm · clearance 1.8 mm · PH00 / Torx T4–T5
Battery (qty 1)
pitch 0.35 mm · tap 1.25 mm · clearance 1.8 mm · PH00 / Torx T4–T5
Battery (qty 4, broadhead)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Fan (qty 2)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
SSD (qty 1)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
System board (qty 4, broadhead)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
DC-in (qty 1)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Fan (qty 2)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
SSD (qty 2)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Touchpad (qty 3)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Wireless card (qty 1)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Hinge (qty 5)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Base cover (qty 6)
pitch 0.4 mm · tap 1.6 mm · clearance 2.4 mm · PH0 / Torx T6
Hinge (qty 5)
pitch 0.45 mm · tap 2.05 mm · clearance 2.9 mm · PH1 / Torx T8
How to check the screw before you buy
- A screw that is even 1 mm too long in a laptop base can push into the keyboard, battery or a board trace, so match the length position by position.
- Diameter: across the threads an M1.2 screw measures about 1.2 mm with calipers (usually a hair under). This device also uses M1.6 / M2 / M2.5, so measure each screw rather than assuming they match.
- Pitch: 0.25 mm from one thread crest to the next (40 crests per centimetre). A thread pitch gauge or the pitch-gauge tool settles it in seconds.
- Length: measure from under the head to the tip for pan, button, wafer and cap heads; countersunk (flat) heads are measured overall.
- The records span 1.3–4 mm, which means different positions take different lengths — match each hole to its own screw.
- Driver: the source does not name the drive. Standard M1.2 heads take PH000 / JIS 00 for Phillips and T1–T2 for Torx; a bit that fits loosely will cam out and strip the head.
- Tightening: no device-specific torque is published in these records. The site's general figure for M1.2 is about 5-8 N·cm into metal threads and 3-5 N·cm into plastic bosses; snug it up and stop.
Common mix-ups with M1.2 / M1.6 / M2 / M2.5
- Framework lists both M1.2 x 3.0 silver and M1.6 x 3.0 black expansion-card screws; they look identical in the tray but are not interchangeable.
- M1.6 is the most common laptop-internal micro screw after M2 — Dell XPS keyboards specifically call out M1.6 x 1.5mm, and generic M2 substitutes strip the bracket.
- M.2 SSD mounting screws (M2 x 3mm) are frequently mislabeled generically as 'M.2 screws' which can be confused with the M2 metric thread designation — they do coincide numerically here but are conceptually distinct (M.2 = card format, M2 = thread size).
- Dell/HP/Lenovo manuals often list screws only by torque or head shape, so community teardowns are needed for diameter.
Buy these screws at TechSpare Warehouse
In stock and shipped from South Carolina. Our black screws are Phillips wafer head (low profile); match the head style and length to the original before you order.
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M1.2 x 2mm Phillips Wafer Head Screw for Digital Camera & Micro Robotics - Pack of 50 Black
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M1.2 x 2mm Screws for FPV Drone Build Phillips Wafer Head 10-Pack
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M1.6 x 4mm Screws Compatible with Dell XPS 14 9440 Battery System Board 10-Pack
$4.99 -
M1.6 x 4mm Phillips Wafer Head Micro Screws LCD Shell Repair 10-Pack
$4.99
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10x M2 x 2mm Phillips Screws for HP EliteBook 840 G6 846 G6 SSD WiFi
$4.99 -
M2 x 2mm Phillips Flat Head Screw for HP EliteBook 840/846 G6 Laptop Repair - Pack of 100 Black
$7.99
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ASUS ROG Strix G15 G513R Replacement Screws Sold Individually – M1.6 x 3mm, M2 x 2.5mm, M2 x 3mm, M2.5 x 6mm Phillips Wafer Head, Black
$0.10Choose size -
ASUS ROG Strix G17 G713 Replacement Screws Sold Individually – M1.6 x 3mm, M2 x 2.5mm, M2 x 3mm, M2.5 x 6mm Phillips Wafer Head, Black
$0.10Choose size
More in Laptops & PCs
The same screw also fits
Devices whose records share a thread with Dell Inspiron 13 7390 2-in-1, closest length match first.
- Lenovo E40-30 also M2 × 2 mm
- MSI Prestige / GF series laptop (MS-15F4) also M2 × 2 mm
- Dell Chromebook 13 3380 also M1.6 × 2 mm
- HP Spectre x360 14 inch 2-in-1 also M1.6 × 2 mm
- Dell Inspiron 14 5405 also M1.6 × 2 mm
- HP 340 G4 also M2 × 2 mm
- HP Compaq Mini 110 also M2 × 3 mm
- HP Compaq Evo N410c also M2 × 3 mm
Questions about Dell Inspiron 13 7390 2-in-1 screws
- What size screw does Dell Inspiron 13 7390 2-in-1 use?
- M1.2 × 1.3 mm for keyboard (qty 4); M1.2 × 1.8 mm for keyboard (qty 29); M1.6 × 2 mm for touchpad (qty 3); M1.6 × 4 mm for battery (qty 1); M2 × 2 mm for battery (qty 4, broadhead); M2 × 2 mm for fan (qty 2); M2 × 2 mm for SSD (qty 1); M2 × 2 mm for system board (qty 4, broadhead); M2 × 3 mm for DC-in (qty 1); M2 × 3 mm for fan (qty 2); M2 × 3 mm for SSD (qty 2); M2 × 3 mm for touchpad (qty 3); M2 × 3 mm for wireless card (qty 1); M2 × 3.5 mm for hinge (qty 5); M2 × 4 mm for base cover (qty 6); M2.5 × 3.5 mm for hinge (qty 5).
- How long are the screws in Dell Inspiron 13 7390 2-in-1?
- The records range from 1.3 to 4 mm depending on the position, so match each screw to its own hole.
- What is the thread pitch of an M1.2 screw?
- 0.25 mm (coarse), which is the standard pitch for M1.2 machine screws. The tap drill is 0.95 mm and the normal clearance hole is 1.4 mm.
- What screwdriver do I need for Dell Inspiron 13 7390 2-in-1?
- The sources do not name the drive. For M1.2, Phillips heads normally take PH000 / JIS 00 and Torx heads T1–T2.
- Can I use an imperial screw instead of M1.2?
- No. Imperial look-alike: #0-80 UNF (1.52 mm) is the closest imperial screw, but it is bigger — not a substitute. Use a true M1.2 screw so it does not cross-thread or strip the hole.
- Where can I buy replacement screws for Dell Inspiron 13 7390 2-in-1?
- TechSpareWarehouse (our own store) lists M1.2 x 2mm, M1.6 x 4mm and M2 x 2mm, which match lengths in the records above.